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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 554 | $dupe .= ") AND comment_content = '$comment_content' LIMIT 1"; |
| 555 | if ( $wpdb->get_var($dupe) ) { |
| 556 | do_action( 'comment_duplicate_trigger', $commentdata ); |
| 557 | if ( defined('DOING_AJAX') ) |
| 558 | die( __('Duplicate comment detected; it looks as though you’ve already said that!') ); |
| 559 | |
| 560 | wp_die( __('Duplicate comment detected; it looks as though you’ve already said that!') ); |
| 561 | } |
| 562 | |
| 563 | do_action( 'check_comment_flood', $comment_author_IP, $comment_author_email, $comment_date_gmt ); |
| 564 | |
| 565 | if ( isset($user_id) && $user_id) { |
| 566 | $userdata = get_userdata($user_id); |
| 567 | $user = new WP_User($user_id); |
| 568 | $post_author = $wpdb->get_var($wpdb->prepare("SELECT post_author FROM $wpdb->posts WHERE ID = %d LIMIT 1", $comment_post_ID)); |
| 569 | } |
| 570 | |
| 571 | if ( isset($userdata) && ( $user_id == $post_author || $user->has_cap('moderate_comments') ) ) { |
| 572 | // The author and the admins get respect. |